Bladed cylinder.



R. F. WHITNEY.

BLA'DED CYLINDER. APPLICATION FILED AueJ. 1916.

l i 1 1.3 Patented Kpr. 10, 1917.

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R. F/WHITNEY.

BLADED CYLINDER.

APPLICATION FILED AUG.7. 191s.

LQLQWW Patented Ap r. 10, 1917.

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ROBERT F. WHITNEY, OF WINCHESTER, MASSACHUSETTS.

BLADED CYLINDER.

Specification of Lettert latent.

Patented Apr. 10, 1917..

Application filed August 7, 1916. Serial No. 113,422.

To all whom it may concern:

Be it known that 1, ROBERT F. WHITNEY, a citizen of the United States, and a resident of Winchester, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Bladed Cylinders, of which the following is a specification.

This invention relates to improvements in bladed cylinders for hide and leather working machines, and its object is to secure a cylinder provided with yielding blades adapted to thoroughly perform the Work of unhairing, fine hairing, working-out, setting, etc.

To accomplish this, I preferably take the ordinary cylinder furnished with fixed blades and aflix thereto, positioned between the fixed blades as may be desired, a plurality of what may be called slicker or fine-working blades, of any desired length or lengths, preferably made of steel and each blade bent, preferably at right angles, thereby providing a flange which may be countersunk into the cylinder and yieldingly held therein 'by resilient means as hereinafter fully described.

To secure a cylinder furnished throughout with yielding blades, I take a bladeless cylinder having a resilient surface, as of rubber, and afiix' to this yielding surface a plurality of blades of any desired length or lengths and positioned as may be desired de pending upon the particular operation for which they are to be used.

The invention is illustrated by the accompanying drawings in which:

Figure 1 is an elevation of the cylinder;

Fig. 2 is a sectional view on the line 2-2 Fig. 1.;

Fig. 3 is a detailed view showing how the slicker blade is mounted;

Fig. 4 is a detailed view showing the slicker blade in operation;

Fig. 5 is a detailed view showing another way of mounting the slicker blade;

Fig. 6 shows in elevation a cylinder surfaced with soft rubber;

Fig. 7 is a section on the line 7-7 Fig. 6; Fig. 8 shows in section a fragment of a cylinder surfaced with soft rubber superimposed on sponge rubber; and

Fig. 9 is a detailed fragmental view showing the blade in operation, when aflixed to a rubber surfaced cylinder.

The cylinder 1 is furnished with blades 2 helically arranged and secured to said cylinder by calking metal 3 and between these blades are disposed other comparatively short blades 4- preferably arranged parallel to the axis of the cylinder and each bent at right angles to form a flange 5 countersunk into the cylinder, on which flange is superimposed a yielding strip 6, preferably of rubber, and each blade is secured to the cylinder by studs 7 extending through the yielding strip and through the flange. The blade thus resiliently mounted, when work ing on the hide or skin 10, inclines rearwardly at an angle (Fig. 4t) varying with the thickness of the hide or skin presented thereto; and, as is apparent, the greater such inclination of a blade rearwardly, the safer its working angle.

Where the blades are mounted on a resilient element (as 6 in Fig. 5) or on the rubber surface 8 of a cylinder, as in Figs. 6, 7, 8 and 9, they will not only yield rearwardly as just described, when the roll is in operation, but they will also be pressed approxi mately radially into the yielding rubber sup port as illustrated by blade 4: (Fig. 9) and this form of cylinder is intended especially for more delicate work, such as working-out and fine-hairing of calf, sheep, and other light skins. Another advantage of the yielding blade is that it may be given a sharper edge without fear of resulting damage to the hide or skin. Preferably the slicker blades are straight and disposed parallel to the axis of the cylinder with their ends overlapping (Fig. 1), thereby forming a series of practically continuous blades. Experiment has shown that blades havin a thin square edge and disposed as just escribed gill most effectively remove fine hair and irt.

With the form of cylinder shown in Fig. 1 the fixed helical blades 2 with their blunt edges are employed to do the spreading and the coarse work, while the yielding blades with their sharp edges do the finer work. Whether the flange 5 of the blade is disposed between the cylinder 1 and the rubber strip 6, as shown in Fig. 3, or the rubber strip is disposed between the cylinder and the flange,

as shown in Fig. 5, there is provided in the flange a clearance 11 for the stud 7 in order to permit the desired tilting movement of the blade.

I claim: 1. A bladed cylinder for hide and leather coi working machinery comprising, in combinaally with a plurality of fixed blades and with a plurality of studs; 7 and a plurality of flanged blades loosely mounted on the studs and confined thereon by cushioning means.

3. In a bladed cylinder of the character described, a stud disposed on the periphery of the cylinder; and a flanged blade loosely mounted on the stud and confined thereon by cushioning means.

In testimony whereof I have afiixed my signature.

ROBERT F. WHITNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, 11.6. 

